Quando a temperatura de um cilindro é aumentada de 0ºC para 100ºC, seu comprimento aumenta 0,17%. Com o auxílio da tabela abaixo, encontre de qual material o cilindro é feito.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?